Improvement in tube-extractors



gaat entre @nel eww Letters Patent No. 111,146, dated January 24, 1871.

IMPRovEMEN-r |N 'roei-:txTRAeToRsl The Schedule referred to intheseLetters Patent and making part of the same.

I, ISAAC S. PETERS, ofthe city of .Marshall, in'

the` county of Calhoun and VState of Michigan, have inventedlan improvedtool for drawing out tubes or other hollow bodies from theirseats,-wl1ich I denominatea Tube-Extractor, of which the following is aspecification. v

My invention relates to the combination, with a;

p pointed bar, of one or more clutching-dogs, placed within a mortise ormortises made through the center of said bar, and pivotedthereto insuchway that the dog will have a free, but limited, vibrating oroscillating motion on its pivot, the object being to readily andlsecurely clutch or dog the interior of tubes, pipes, or other analogousforms, and extract thel same, when necessary, from places inaccessibleto ordinary tools.

My invention is embodied in the annexed drawing,

making a part of thisspecitication, in which- Figurel is a sideelevation of the tube-extractor,` and broken section of the connectedoperating-pipe or rod.A

Figure 2 exhibits the upper part of the same in elevation, anda centrallongitudinal section of its penetration within a broken section oi'the'tube to be extracted.

I will iirst proceed to describe the construction of my tube-extractorwhen applied to the withdrawal of tubing from below the gronud-surface.y

A is the clutch-bar, pointed, as shown, at the lower end 11, tofacilitate its Vintroduction in to the bore of the lost tube-section.

B is a screw coupling-ring, by-.whieh the opposite end of the clutch-barmaybe connected to sufficient length ot"tubesections, c, to reach thelost section of the tube below ground. 4

C isla' mortise, made centrally through the clutching-bar. D isthc'clutching-dog, placed within the mortisc', and pivoted, as shown, tothe bar, so ,thatsaid dog will vibrate on ils pivot within a certaincircumscribed arc.

'lhis dog and the pin or pivoton which it works should both be of tinesteel, and it is convenient to insert and secure the pivot so that itmay be readily removed and replaced for chaugcsof dogs to suit tubes ofother calibex-s;

'l represents a broken section of a point or tube supposed to beimbedded atsolne depth in the ground, within the bore, made iny sinkingthe well-tubing.

The elutchin -dor D is sim ly a flat-sided piece of g e D steel,Vpivoted out of the center lengthwise, so as to act cam-like in jammingthe clutching-bar against the side of the tube to' be drawn; but `inorder to prevent thisjamungeaction from springing suoli tube oval'I form'on the perimeter of the dog one or more chiselfprojections of spurs,which bi/te into the vmetal of the tube when the clutching-bar is drawnback a very small distance.`

Several of these dogs may-be employed either on the same side, oralternately placed on opposite sides of the clutch-bar, to dog the tubeat different points where a very great force is required for itsextraction; but'one alone is usually sui'cient.

I The modus operandi in extracting a lost tube 4from bel'ow ground isas'follows': Y

'lhe upper tubing being drawn out of the ground in any of the usualways, the clutch-bar A, of a diameter less thanA the bore of the tube,andfitted with a dog, D, of suitable size, is coupled' to vthe withdrawntubing,'or to suitable rods, and driven through the ground-bore untilitspointed end enters-the lost tube.

Ihe clutching-dog is so pivoted within the mortise that said dog willvibrate within the body of the bar to accommodate itself to the bore ofthe tube as 'it enters, the pendulous gravity, or over-balance of thespur, causing it to bear in constant contact vwith the Y side of thetube. e

The length of the dog from that side of the bar that bears against thetube to the spur-point being greater thanthe radius oi' the tube, itfollows that the upward or other withdrawalfmotion of the bar will, ii'the dog bears at the proper angle, cause the spur or spurs to sink intothe tube,.when it can readily be extracted.

.I1 do not desire to confine myself` to any special `number of dogs,their form, or the arrangement of the spur or spurs they may carry', forthese point-s will necessarily be determined bythe peculiarcircumstances of their use; and I will here state that, after thetube-section has been drawn out, the clutching-bar is readily detachedby simply pushing it a little further within the recovered point ortube,

which will.liberate the spurs; then, by holding them upside down, thedog`will so vibrate within the mortise as to allow the bar to be drawnout.

The lost perforated point-sections, so often broken off below ground byjamming among stones, while constructing driven-wells, can quickly berecovered by the use of my tube-extractor.

But besides this and analogous uses, it may be employed to very greatadvantage in withdrawing tubes ii'om steam-boilers, furnaces, Snc 'butwhere the pull is downward the position of the dog must be reversed 'inthebar, and for these uses a pointed end may usually be dispensed with.

I claim as my invention- Au Aimplement fo'r extracting tubes from wells,consisting of the dog D and bar 'A, when the dog is eccentricallypivoted", and projects at both sides of the bar, being provided at cachend with a spur which enters the metal, substantially as hereindescribed.

ISAAC S. PE'IERS.

Witnesses:

C. C. DODGE, SILAs PEIEns.A

